> It also impedes accessibility-related plugins trying to extract the content and present it to the user in whatever way is compatible to their needs.

I'm not sure I agree that this is relevant advice today. Screen readers and other assistive technology fully support dynamic content in web pages, and have for years.

Yes, it's good for sites to provide content without JavaScript where possible. But don't make the mistake of conflating the "without JavaScript" version with the accessible version.